Mold for casting artificial building-stone with outer and inner, vertical and horizontal through-canals



H. GRONROOS. MOLD FOR CASTING ARTIFICIAL BUILDING STONE WITH OUTER AND INNER, VERTICAL AND HORIZONTAL THROUGH CANALS'.' APPLICATION FILED 05c. 11. 1911.

1,340,952, Patented May 25,1920;

2 SHEETS-SHEET I.

H. GRONROOS.

MOLD FOR CASTING ARTIFICIAL BUILDING STONE WITH OUTER AND INNER, VERTICAL AND HORIZONTAL THROUGHCANALS.

ARPLICATION FILED DEC. I1, I91?- 1,340,952. Patented May 25, .1920;

2 SHEETS-SHEET 2- I IVVE/VTO/T'.

UNITEE STATES PATENT ()FFICE.

HUGO GRGNROOS, OF COPENHAGEN, DENMARK.

OUTER AND INNER,

Application filed. December 11, 1917.

To all whom, it may concern:

Be it known that I, HUGO GRoNRoos, citizen of Finland, residing at 74; Ohlenschlagersgrade, Copenhagen, B, Denmark, have invented new and useful Improvements in Molds for Casting Artificial Building-Stone with Outer and Inner, Vertical and Horizontal Through-Canals, of which the following is a speciiicatiton.

My invention refers to a mold for casting artificial building stone with outer and inner vertical and horizontal through canals. Moldsfor casting artificial building stone with both outer and inner canals are already known, but the passages in the stone cast in these molds all run in the same direction; but, in order to cause air circulation in a wall in both vertical and horizontal direction it is necessary for the vertical canals t c communicate with lateral canals which run from the vertical canals out to the end sur' faces of the stone. In the molds hitherto used for casting hollow artificial building stone there have been used cores which, after the casting is finished, can be removed, for instance by pulling out from below, at the same time that the mold-frame is moved downward, while the loose bottom, on which the cast stone rests, remains in position, or the loose bottom is so devised as to be lifted up by the frame.

The already known use of movable, ver

tical cores for making the vertical canals in the stone is also made use of in the mold which is the object of this invention, but the frame of my mold cannot be moved down ward, nor can the bottom on which the cast stone rests be moved upward, owing to the fact, that there must be used horizontal cores for making the horizontal lateral canals from the vertical canals out to the end surfaces of the stone. The cores serving to make the horizontal lateral canals are, according to my invention, disposed on plates which are movable in relation to the end-walls of the mold frame, said walls being hinged to the mold, while the lateral walls are removably disposed. The cores for making the lateral canals pass through holes in the end-walls of the mold, and may be moved out of or into said holes one by one or all at once. By constructing the mold in the aforesaid way, it is possible to cast artificial building stone of the afore- Specifieation of Ietters Patent.

Patented May 25, 1920. Serial No. 206,654.

said kind on a scale large enough for wholesale manufacture.

By way of example one form of construction of my invention is set forth in the drawing, in which- Figure 1 shows an artificial building stone of this kind in perspective,

Fig. 2 is a top view of the mold, and

Figs. 3 and i are sections along the lines III-III and IV-IV respectively in Fig. 2, and

Fig. 5 is a top view of the separated mold.

s shown in Fig. 1 the stone has three vertical canals a, Z), c, and horizontal lateral canals (Z. Through the canals a and c and the canals 03 it is possible to accomplish an air-circulation or insulation throughout the entire wall, both outside and inside, while the canals I) serve to receive reinforcing irons and mortar.

The mold in which the herein described artificial building stone is cast consists of a bottom plate 1, two side walls 2, and endwalls 3.

The end-walls 3 are hinged to the bottom 1, which rests on an underlying frame 4, in which there is space for a removable plate 5. 6, 7 and 8 are the vertical cores which rest on the plate 5, and which pass through holes in the bottom plate 1 and a loose plate 9 disposed on top of the bottom plate, the stone being cast on the loose plate 9 on which it is left standing while setting, after it has been removed from the mold. @n the outer sides of the end-walls 3 there are disposed plates 3 which carry cores 10, 11, by means of which the horizontal canals (Z in the stone are made, and which pass through holes in the end-walls. F urthermore each of the end-walls carries a cleat 12 by means of which there are formed vertical hollows c (Fig. 1) in the end-walls of the stone, so that there are also formed vertical canals between the stones when put together, said intermediate, vertical canals corresponding to the canals 6. Through the cleats 12 there may be inserted cores 16 which are fastened to the plates 3 and by means of which there may be made hori zontal canals between the hollows e and the vertical canals b, so that there may be a connection in the casting or masonry in the wall itself.

The plates 3 for each end-wall may either consist of one piece or they may be divided, so that either all the cores may be'removed simultaneously, or the outer ones simultaneously and thenthemiddle ones. This device is to prevent-the edges of the stones from being damaged when the cores are being removed.

The side walls 2- of the mold are loosely V disposed and are held in place in the mold into the mold and scraped off evenly at the top, so as to be just flush with'the top edge of the mold, the

of cleats 13 and 14 onth'e end by means together by means pieces. The mold is held of hooks or clamps 15.

The mold is used 1n the following man- It is placed on a suitable bed,which will permit the vertical cores 6, 7,8 to be pulled downward. The cores are disposed and held in place by'means of the removable plate 5. 'Theside pieces 2 are placed on the bottom Latter the loose plate 9 has been laid on the top of the latter, and finally the end pieces, after, the cores 10 and 11 are passed in and secured ,to the latter," are raised up against the side pieces and held fast against them by means of the clamps 15.v Then after .the mortar has been filled stamped down and mold is separated by pulling out the bottom plate 5, by pu1ling the .vertical cor'es downward, by "pulling the horizontal cores out to the ends by then removing the clamps 15,

and by letting down the end pieces and re- Now the finished moving the side pieces.

blocks comprising a stone stands on the loose plate 9 and can be moved from the mold on this plate.

1'. An apparatus for-molding building 7 tom, side, and bottom member, cores supported in the-bottom member, and cores removably fitted in the side members and coacting with the other cores for the purpose described.

2.,An apparatus ,for molding building blocks comprising a frame including bottom, side and end members, cores supported in the bottom member, plates movably secured to the outer side of the end members,

frame including botend members hinged to the and cores carried by said plates and extending through the end members and coacting withtheotherfcores. V

In testimony whereof I have signed my name to this specification in the presence of twosubscribing witnesses. a

' HUGO GRONROOS;

WVit'nessesf V V. BELSELMER, F. EnenrgiAnnrMAnsnn. 

